I'm wondering what the difference is between a VFD and servo drive are. I'm pretty familiar with VFDs but not so much with servo drives. From what I read, would the following assumptions be correct? A variable frequency drive without an encoder module will adjust the frequency and amplitude of a 3 phase voltage signal to control a motor. A servo drive will essentially do the same, but is more accurate because an encoder is built into the motor which then will make requests back to the drive to make changes to the voltage signal to meet certain requirements such as speed or position. Are these the main differences or is there more?